Temple of the First Fire (5E)

From publisher blurb:

The Temple of the First Fire is a 5e adventure in which a group of heroes must stop an ancient, evil witch known as the Raven Mocker from stealing the eternal flame that lights the sun. If the witch succeeds, it would plunge all humanity into endless darkness. It features a corrupted guardian, a temple suspended from the heavens by divine chains, and a series of unusual encounters, as well as four third-level pregenerated characters!

A two-hour adventure for three to seven 2nd-5th level characters.